In this study, reliability and validity are assessed for a Turkish culture adaptation of the Collective Moral Disengagement Scale for Adolescents. The study was carried out in two stages. In the first stage, translation, exploratory factor analysis, internal consistency coefficients, and test-retest method were performed; in the second stage, confirmatory factor analysis, and compliance validation study were conducted. In the first stage of the research, a total of 339 adolescents and in the second stage, 283 adolescents participated. At the end of the exploratory factor analysis performed in the first stage of the research, it is observed that the CMDS (Collective Moral Disengagement Scale for Adolescents) explained 35 percent of total variance. The factor loadings of the scale items ranged from 0.41 to 0.76. In addition, the internal consistency coefficient was found as 0.86 and test-retest reliability coefficient as 0.86 at the end of the analysis made for the CMDS's reliability in the first stage. At the end of confirmatory factor analysis made in the second stage, acceptable fit indices were obtained (?[superscript 2] = 288.07, df = 90, ?[superscript 2]/df = 3.20, RMSEA = 0.08, RMR = 0.13, SRMR = 0.06, GFI = 0.89, AGFI = 0.85, CFI = 0.94, NNFI = 0.93). Within the compliance validity of CMDS, correlation coefficients of Bullying Scale and Bullying Sub-scale (0.41) and the Victim Subscale (0.47) were examined. In conclusion, we can say that the Turkish form of 15-item Collective Moral Disengagement Scale for Adolescents is valid and reliable.